Combined drill and reamer for pearl buttons



P. F. DUSHA AND A. FEYKJ COMBINED DRILL AND REAMER FOR PEARL BUTTONS.

APPLICATION FILED 001.17, 1919.

1 41 1 207 Patented Mar. 28, 1922.

mm/m/es BEDushw ATTORNEY WITNESSES UNITED STATES PATEN OFFICE.

PAUL F. DUSHA, or NEW YORK, AND ANTON rnYx, OFBOBEMI NE Yoax.

ooMBINnnnRILI. AND REAMER ron PEARL BU'r'roN's. 3

ANTON FEYK, citizens of the United States,

and residents of the city of New York, borough of Manhattan, in thecounty and State of New York,'and Bohemia, in the county of Sufiolk andState of New York, respectively, have invented a new'and ImprovedCombined Drill and Reamer for Pearl Buttons, of which the following is afull, clear, and exact description. 1

This invention relates to pearl button manufacturing machinery andconstitutes an improvement on the devices described and claimed in theLetters Patent of the United States issued on our application to Holub-Dusha Co, of New York, on the 28th day of November 1916, No. 1,206,518.

1 Among the objects of the present improvement is to provide a combineddrill and countersink for the making and finishing of a buttonhole andin a single or continuous operation of the drilling machine.

A further object of the invention is to provide a combined drill andcountersink of such a character as to enable it to be maintained sharpautomatically by any suitable means, such for instance as the sharpeningmeans set forth in the aforesaid patent.

With the foregoing and other objects in view the invention consists inthe arrangement and combination of parts hereinafter described andclaimed, and while the invention is not restricted to the exact detailsof construction disclosed or suggested herein, still for the purpose ofillustrating a practical embodiment thereof, reference is had to theaccompanying drawings, in which like reference characters designate thesame parts in the several views, and in which- Fig. 1 is a.verticallongitudinal section of a modified form of combined drill andcountersink and holding means therefor; and

Fig. 2 is an enlarged perspective view of the combined drill andcounterslnk of the Specification of Letters Patent. Patented Applicationfiled October 17, 1919. Serial No. 331,340.v

Hair. 28, 1 922.

formed chuck13. Combined; with the drill '12 is a special countersinkbit 24, the-same being formed from a single bar or wire of high speedsteel or the equivalent, the same as the drill 12. In order to combinethe countersink bit 24 with the drill 12, we provide a specially formedchuck 13 adapted to receive the drill 12 precisely in its axis as isnecessary for the drilling of a hole in the button, and having a portioncut away in the side for the recep tion of the countersink bit 24 sothat the latter will lie directly against the drill and be carried bymeans of the chuck and spindle around the axis of the drill.

When the drill is brought down in the operation of the machine to drilla hole in the button after the drill point asses through the button, thecountersink] it 24 will be brought into action to smooth and countersinkthe'upper edge of the hole to prevent thread cutting. Obviously theoperation is completed by a single longitudinal movement of the drilland countersinking devices with practically no more loss of time than inthe simple drilling of the hole under the old practice.

In the formation of the cutting end of the drill with cutting edges ofbevel facets 12 and 12 kept sharpened automatically, as described in theabove-mentioned patent. we find that the same automatic action. of thesharpening wheels will at the same time keep the countersink bitsharpened with the formation of a facet 24 which lies in the same planeas the main facet 12 of the drill oint. By virtue of the inclination ofthe plane with respect to the axis of the drill we find that theeffective length of the drill below the cutting portion of thecountersink bit is always ample for the formation of the main portion ofthe buttonhole.

WVe would state in conclusion that while the illustrated exampleconstitutes a practical embodiment of our invention, we do not limitourselves strictly to the exact de- "tails herein illustrated sincemanifestly the sink bar, the plane of which face intersects the line ofcontact between the drill and countersink bar and is at an acute an 1ewith the axis of the bar, and'means forh'o' ding the drill andcountersink bar in proper relative positi 0ns.

cutting edge formed bycutting on its lower end a plurality offacetstheplanes,ofwhich intersect, a countersink bar of convex shape, aface cut on the .countersinkbar, the plane of which face jintersectsitheline' of contact between the drill and: countersink .bar and is at anacuteangle, Withthe axis of the bar, and means forholding the drill andcountersink bar together.

3. In combination With a drill havinga' 'w vedge-shaped cutting" end, acounter'smk bar of convex shape, aface cut on the lower 7 end of thecountersink liar, the plane of 2. In combmation with a drill having awhich face intersects the line of contact hetween-the drill andcountersinkbarnand'is at an acute Iangle with the'axis of the bar,

and clamping'ineans "for holding the countersink bar against the drill.

